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Zipizapp

Independent developer

Apps, websites, and other experiments

I build personal projects across different areas, blending product, design, and code. Some start from practical needs and others from curiosity, but all of them aim to solve something real or explore new ideas.

These are my projects

Apps and websites I have been building and improving over time.

DroPilot · Music

APP
DroPilot app icon

DroPilot

Free tuner, chords, voicings & harmony · Guitar app

An app for guitarists who want to move beyond the same old chords and discover new ways to play the same progression—with more colour, movement, and musicality.

  • Explore different sounds for the same progression.
  • Practical, musical focus—not abstract theory.
  • Great for writing, studying, and trying new ideas.

Built with

  • Flutter
  • Dart
  • In-app purchases
Get it on Google PlayDownload on the App Store
APP
DroPilot Arpeggios app icon

DroPilot Arpeggios

Guitar arpeggio practice

An app to practice guitar arpeggios visually on the fretboard. Work with triads and 7th chords in real progressions, adjust tempo, use backing tracks and explore alternative arpeggio overlays.

  • Visual arpeggio practice in real chord progressions.
  • Triads, 7th chords, overlays and favorites.
  • Ideal for accompaniment, harmony study and improvisation.

Built with

  • Flutter
  • Dart
  • In-app purchases
Get it on Google PlayDownload on the App Store
APP
DroPilot Modes app icon

DroPilot Modes

Guitar modes practice

An app to understand and practice guitar modes visually. Choose a root note and mode, explore the fretboard, hear a practice backing track and work with major scale and melodic minor modes.

  • Major scale and melodic minor modes with 7 positions.
  • Notes, intervals, characteristic note, backing tracks and favorites.
  • Ideal for recognising each mode's sound, not just memorising shapes.

Built with

  • Flutter
  • Dart
  • In-app purchases
Get it on Google PlayDownload on the App Store
APP
DroPilot Pentatonics app icon

DroPilot Pentatonics

Pentatonic scale practice

Learn, practice and use pentatonic scales across the whole fretboard. Five scales, five connected positions, playback practice, progressions with smart scale suggestions and a built-in tuner.

  • Five pentatonic scales and five connected positions.
  • Progressions, dictionaries and favorites.
  • Ideal for improvising clearly from your first box.

Built with

  • Flutter
  • Dart
  • In-app purchases
Get it on Google PlayDownload on the App Store

Mass · Productivity

APP
Mass SVG Color app icon

Mass SVG Color

Desktop app · Batch-recolor SVGs for Windows

Load SVGs, folders or ZIP files, pick a color and export a unified icon set. Free exports up to 10 files; Pro unlocks unlimited export.

  • Batch recolor fills and strokes.
  • Drop SVGs, folders or ZIP archives.
  • Free for Windows · Pro: up to 3 activations.

Built with

  • Tauri
  • TypeScript
  • Gumroad
APP
Mass Watermark Pro app icon

Mass Watermark Pro

Desktop app · Batch-watermark images for Windows

Load photos, folders or ZIP files, place your logo and export a branded set. Free exports up to 10 images; Pro unlocks unlimited export via Microsoft Store.

  • Batch watermark JPG, PNG, WEBP and more.
  • Drop images, folders or ZIP archives.
  • Free on Microsoft Store · Pro: one-time unlock.

Built with

  • Tauri
  • TypeScript
  • Microsoft Store

Games

APP
Hijo Fruta app icon

Hijo Fruta

Turn-based card game · Fast matches with risk and strategy

A casual game inspired by the Spanish deck, designed for quick matches where intuition, risk, and reading your rival matter a lot.

  • Fast turn-based matches that are easy to understand.
  • Blend of luck, risk, and decision-making.
  • Focused on playing against bots and, later on, online.

Built with

  • Flutter
  • Supabase
  • Push notifications

Webs

Free course

Armonía DroPilot

Free guitar harmony course

A free, ordered guitar harmony course—from fundamentals to improvisation and advanced scales—with real fretboard practice.

Guitar study scene from the free harmony course
Fretboard practice from the free harmony course

Features

  • 187 lessons across 12 progressive blocks.
  • Triads, chords, arpeggios, modes, pentatonics and improvisation.
  • Free harmony course: open access—no subscription or payment.

Built with

  • Next.js
  • MDX
  • TypeScript
WEB

Criterio Musical

criteriomusical.com · Music discovery platform

A platform to discover, save, and share music with human judgment—putting people first and algorithmic noise second.

Features

  • Music recommendations.
  • Local musicians, venues, gigs, video library, and more.
  • Forum, studios, music marketplace, and more.

Built with

  • Next.js
  • Prisma
  • PostgreSQL

Contact

Whether you want to chat about a project, a collaboration, or just say hi—get in touch.

Portrait of Pablo, developer behind Zipizapp